I haven't said this in years, but please would you help with my (CBT) homework?

I am participating in CBT to help me learn new ways to manage myself in challenging situations. My therapist/practitioner/tutor suggested we each seek answers to questions about a hypothetical scenario. I hope it's ok to post this here, I wondered if there's anyone with a few minutes to spare who wouldn't mind sharing their thoughts.

Many thanks for reading and many more if you are able to answer - completely understand that everyone's busy. I am happy to update when we've compared answers to see how mental health professionals differ from any answers I receive if anyone has any interest.

The Situation:

(From the perspective of a car driver, imagined or real)

If you were stopped in a parking space to drop someone off and someone pulled up alongside and became confrontational about you being there, got out of their car and started shouting and taking your registration number:

1) How would you feel? 

2) What would you do?

3) Is it unreasonable to feel helpless and upset?

4) How would you 'come down' from that?